This paper deals with the feeding habit and the seasonal variation in food content of C.semilaevis in the South Bohai sea. Altogether, 821 stomachs of the adult specimens, 18-57 cm in standard length,collected from the mouth of the yellow river and the Laizhouwan Bay in the Bohai sea from 1982 to 1983 have been studied. The results are as follows.C. semilaevis is a predatory fish with a more mixed diet. It takes nearly 50 species of animals, mainly shrimps, crabs, small fishes and bivalvia, of which the fol...